Spin current at a magnetic junction as a probe of the Kondo state

Article

关键词: PERTURBATION EXPANSION;    RENORMALIZATION-GROUP;    IMPURITY;    SCATTERING;   

DOI  :  10.1103/PhysRevB.104.L121401

来源: SCIE

【 摘 要 】

We investigate the spin Seebeck effect and spin pumping in a junction between a ferromagnetic insulator and a magnetic impurity deposited on a normal metal. By performing a numerical renormalization group calculation, we show that spin current is enhanced by the Kondo effect. This spin current is suppressed by an increase in temperature or a magnetic field comparable to the Kondo temperature. Our results indicate that spin transport can be a direct probe of spin excitation in strongly correlated systems.

【 授权许可】

Free